1. speed dome keyboard, support PELCO matrix 2. 3-D joystick, 3.ptz controller,265 preset 4. RS485(semi- duplex)&RS-23 1. speed dome keyboard, support PELCO matrix 2. 3-D joystick,3.ptz controller,265 preset4. RS485(semi- duplex)&RS-23 1.Support PELCO matrix 2. Support 4 keyboards linkage 3.Display command menu,protocol,current camera ID 5.Control the speed of pan/tilt and lens magnification 6. ...